Revert "boards/defconfig: remove fixed CDCACM BUFFER SIZE"

yangsong8-a1 · lupyuen · commit c4001b2433bd · 2025-03-28T08:52:42.000+08:00
Use configuration CDCACM_DISABLE_TXBUF or CDCACM_DISABLE_RXBUF to choose whether to use usb req buffer as the serial buffer. Since the default value is n (not using req buf), the original configuration of buf is valid. This reverts commit 21c8ed8.
diff --git a/Documentation/platforms/arm/kinetis/boards/freedom-k64f/README.txt b/Documentation/platforms/arm/kinetis/boards/freedom-k64f/README.txt
@@ -577,6 +577,9 @@ USB Device Controller Support
       CONFIG_CDCACM_NRDREQS=8                   : Number of read requests
       CONFIG_CDCACM_BULKIN_REQLEN=96            : Size of write request buffer (for full speed)
       CONFIG_CDCACM_BULKIN_REQLEN=768           : Size of write request buffer (for high speed)
+      CONFIG_CDCACM_RXBUFSIZE=257               : Serial read buffer size
+      CONFIG_CDCACM_TXBUFSIZE=193               : Serial transmit buffer size (for full speed)
+      CONFIG_CDCACM_TXBUFSIZE=769               : Serial transmit buffer size (for high speed)
       CONFIG_CDCACM_VENDORID=0x0525             : Vendor ID
       CONFIG_CDCACM_PRODUCTID=0xa4a7            : Product ID
       CONFIG_CDCACM_VENDORSTR="NuttX"           : Vendor string
@@ -590,7 +593,7 @@ USB Device Controller Support
 
     CONFIG_SYSTEM_CDCACM=y                     : Enable connect/disconnect support
     CONFIG_SYSTEM_CDCACM_DEVMINOR=0            : Use device /dev/ttyACM0
-    CONFIG_CDCACM_NRDREQS=???                  : Multiple read requests may be needed
+    CONFIG_CDCACM_RXBUFSIZE=???                : A large RX may be needed
 
   If you include this CDC/ACM application, then you can connect the CDC/ACM
   serial device to the host by entering the command 'sercon' and you detach
diff --git a/Documentation/platforms/arm/kinetis/boards/freedom-k66f/README.txt b/Documentation/platforms/arm/kinetis/boards/freedom-k66f/README.txt
@@ -580,6 +580,9 @@ USB Device Controller Support
       CONFIG_CDCACM_NRDREQS=8                   : Number of read requests
       CONFIG_CDCACM_BULKIN_REQLEN=96            : Size of write request buffer (for full speed)
       CONFIG_CDCACM_BULKIN_REQLEN=768           : Size of write request buffer (for high speed)
+      CONFIG_CDCACM_RXBUFSIZE=257               : Serial read buffer size
+      CONFIG_CDCACM_TXBUFSIZE=193               : Serial transmit buffer size (for full speed)
+      CONFIG_CDCACM_TXBUFSIZE=769               : Serial transmit buffer size (for high speed)
       CONFIG_CDCACM_VENDORID=0x0525             : Vendor ID
       CONFIG_CDCACM_PRODUCTID=0xa4a7            : Product ID
       CONFIG_CDCACM_VENDORSTR="NuttX"           : Vendor string
@@ -593,7 +596,7 @@ USB Device Controller Support
 
     CONFIG_SYSTEM_CDCACM=y                     : Enable connect/disconnect support
     CONFIG_SYSTEM_CDCACM_DEVMINOR=0            : Use device /dev/ttyACM0
-    CONFIG_CDCACM_NRDREQS=???                  : Multiple read requests may be needed
+    CONFIG_CDCACM_RXBUFSIZE=???                : A large RX may be needed
 
   If you include this CDC/ACM application, then you can connect the CDC/ACM
   serial device to the host by entering the command 'sercon' and you detach
diff --git a/Documentation/platforms/arm/sam34/boards/sam4e-ek/README.txt b/Documentation/platforms/arm/sam34/boards/sam4e-ek/README.txt
@@ -593,11 +593,9 @@ USB Full-Speed Device
 
      1. RX buffer size.  All incoming data is buffered by the serial driver
         until it can be read by the application.  The default size of this
-        RX buffer is related to CONFIG_CDCACM_NRDREQS, the maximum packet
-        length and CONFIG_CDCACM_BULKOUT_REQLEN. It can be increased as you
-        see fit:
+        RX buffer is only 256 but can be increased as you see fit:
 
-         CONFIG_CDCACM_NRDREQS=xxx
+         CONFIG_CDCACM_RXBUFSIZE=256        : Default RX buffer size is only 256 bytes
 
      2. Upstream from the RX buffers are USB read request buffers.  Each
         buffer is the maximum size of one USB packet (64 byte) and that cannot
diff --git a/Documentation/platforms/arm/samv7/boards/same70-xplained/README.txt b/Documentation/platforms/arm/samv7/boards/same70-xplained/README.txt
@@ -646,6 +646,9 @@ serial device class:
     CONFIG_CDCACM_NRDREQS=8                   : Number of read requests
     CONFIG_CDCACM_BULKIN_REQLEN=96            : Size of write request buffer (for full speed)
     CONFIG_CDCACM_BULKIN_REQLEN=768           : Size of write request buffer (for high speed)
+    CONFIG_CDCACM_RXBUFSIZE=257               : Serial read buffer size
+    CONFIG_CDCACM_TXBUFSIZE=193               : Serial transmit buffer size (for full speed)
+    CONFIG_CDCACM_TXBUFSIZE=769               : Serial transmit buffer size (for high speed)
     CONFIG_CDCACM_VENDORID=0x0525             : Vendor ID
     CONFIG_CDCACM_PRODUCTID=0xa4a7            : Product ID
     CONFIG_CDCACM_VENDORSTR="NuttX"           : Vendor string
@@ -659,7 +662,7 @@ CDC/ACM serial device:
 
     CONFIG_SYSTEM_CDCACM=y                     : Enable connect/disconnect support
     CONFIG_SYSTEM_CDCACM_DEVMINOR=0            : Use device /dev/ttyACM0
-    CONFIG_CDCACM_NRDREQS=???                  : Multiple read requests may be needed
+    CONFIG_CDCACM_RXBUFSIZE=???                : A large RX may be needed
 
 If you include this CDC/ACM application, then you can connect the CDC/ACM
 serial device to the host by entering the command 'sercon' and you detach
diff --git a/Documentation/platforms/arm/samv7/boards/samv71-xult/README.txt b/Documentation/platforms/arm/samv7/boards/samv71-xult/README.txt
@@ -967,6 +967,9 @@ serial device class:
     CONFIG_CDCACM_NRDREQS=8                   : Number of read requests
     CONFIG_CDCACM_BULKIN_REQLEN=96            : Size of write request buffer (for full speed)
     CONFIG_CDCACM_BULKIN_REQLEN=768           : Size of write request buffer (for high speed)
+    CONFIG_CDCACM_RXBUFSIZE=257               : Serial read buffer size
+    CONFIG_CDCACM_TXBUFSIZE=193               : Serial transmit buffer size (for full speed)
+    CONFIG_CDCACM_TXBUFSIZE=769               : Serial transmit buffer size (for high speed)
     CONFIG_CDCACM_VENDORID=0x0525             : Vendor ID
     CONFIG_CDCACM_PRODUCTID=0xa4a7            : Product ID
     CONFIG_CDCACM_VENDORSTR="NuttX"           : Vendor string
@@ -980,7 +983,7 @@ CDC/ACM serial device:
 
     CONFIG_SYSTEM_CDCACM=y                     : Enable connect/disconnect support
     CONFIG_SYSTEM_CDCACM_DEVMINOR=0            : Use device /dev/ttyACM0
-    CONFIG_CDCACM_NRDREQS=???                  : Multiple read requests may be needed
+    CONFIG_CDCACM_RXBUFSIZE=???                : A large RX may be needed
 
 If you include this CDC/ACM application, then you can connect the CDC/ACM
 serial device to the host by entering the command 'sercon' and you detach
diff --git a/Documentation/platforms/arm/stm32l4/boards/stm32l476vg-disco/index.rst b/Documentation/platforms/arm/stm32l4/boards/stm32l476vg-disco/index.rst
@@ -488,6 +488,8 @@ NOTES:
          CONFIG_CDCACM_NRDREQS=4
          CONFIG_CDCACM_NWRREQS=4
          CONFIG_CDCACM_BULKIN_REQLEN=96
+         CONFIG_CDCACM_RXBUFSIZE=257
+         CONFIG_CDCACM_TXBUFSIZE=193
          CONFIG_CDCACM_VENDORID=0x0525
          CONFIG_CDCACM_PRODUCTID=0xa4a7
          CONFIG_CDCACM_VENDORSTR="NuttX"
diff --git a/Documentation/platforms/arm/stm32l4/boards/stm32l4r9ai-disco/index.rst b/Documentation/platforms/arm/stm32l4/boards/stm32l4r9ai-disco/index.rst
@@ -376,6 +376,8 @@ NOTES:
          CONFIG_CDCACM_NRDREQS=4
          CONFIG_CDCACM_NWRREQS=4
          CONFIG_CDCACM_BULKIN_REQLEN=96
+         CONFIG_CDCACM_RXBUFSIZE=257
+         CONFIG_CDCACM_TXBUFSIZE=193
          CONFIG_CDCACM_VENDORID=0x0525
          CONFIG_CDCACM_PRODUCTID=0xa4a7
          CONFIG_CDCACM_VENDORSTR="NuttX"
diff --git a/boards/arm/imxrt/imxrt1170-evk/configs/netnsh/defconfig b/boards/arm/imxrt/imxrt1170-evk/configs/netnsh/defconfig
@@ -30,6 +30,8 @@ CONFIG_CDCACM=y
 CONFIG_CDCACM_BULKIN_REQLEN=96
 CONFIG_CDCACM_PRODUCTID=0x001d
 CONFIG_CDCACM_PRODUCTSTR="PX4 FMURT1062 v1.x"
+CONFIG_CDCACM_RXBUFSIZE=600
+CONFIG_CDCACM_TXBUFSIZE=12000
 CONFIG_CDCACM_VENDORID=0x1FC9
 CONFIG_CDCACM_VENDORSTR="NXP SEMICONDUCTORS"
 CONFIG_DEBUG_ASSERTIONS=y
diff --git a/boards/arm/lpc214x/mcu123-lpc214x/configs/composite/defconfig b/boards/arm/lpc214x/mcu123-lpc214x/configs/composite/defconfig
@@ -20,6 +20,8 @@ CONFIG_BOARDCTL=y
 CONFIG_BOARD_LOOPSPERMSEC=3270
 CONFIG_CDCACM=y
 CONFIG_CDCACM_COMPOSITE=y
+CONFIG_CDCACM_RXBUFSIZE=256
+CONFIG_CDCACM_TXBUFSIZE=256
 CONFIG_COMPOSITE_CONFIGSTR="system/composite"
 CONFIG_COMPOSITE_IAD=y
 CONFIG_COMPOSITE_PRODUCTID=0x2022
diff --git a/boards/arm/lpc43xx/lpc4337-ws/configs/nsh/defconfig b/boards/arm/lpc43xx/lpc4337-ws/configs/nsh/defconfig
@@ -25,6 +25,8 @@ CONFIG_CDCACM_BULKIN_REQLEN=96
 CONFIG_CDCACM_EPBULKOUT=2
 CONFIG_CDCACM_PRODUCTID=0x2044
 CONFIG_CDCACM_PRODUCTSTR="lpc4337-ws"
+CONFIG_CDCACM_RXBUFSIZE=512
+CONFIG_CDCACM_TXBUFSIZE=2048
 CONFIG_CDCACM_VENDORID=0x03EB
 CONFIG_CDCACM_VENDORSTR="nuttx"
 CONFIG_FAT_LCNAMES=y
diff --git a/boards/arm/lpc43xx/lpc4370-link2/configs/nsh/defconfig b/boards/arm/lpc43xx/lpc4370-link2/configs/nsh/defconfig
@@ -23,6 +23,8 @@ CONFIG_CDCACM=y
 CONFIG_CDCACM_BULKIN_REQLEN=96
 CONFIG_CDCACM_PRODUCTID=0x2044
 CONFIG_CDCACM_PRODUCTSTR="lpc4370-link2"
+CONFIG_CDCACM_RXBUFSIZE=512
+CONFIG_CDCACM_TXBUFSIZE=2048
 CONFIG_CDCACM_VENDORID=0x03EB
 CONFIG_CDCACM_VENDORSTR="nuttx"
 CONFIG_FAT_LCNAMES=y
diff --git a/boards/arm/nrf52/nrf52840-dk/configs/cdcacm/defconfig b/boards/arm/nrf52/nrf52840-dk/configs/cdcacm/defconfig
@@ -17,6 +17,8 @@ CONFIG_ARCH_STDARG_H=y
 CONFIG_BOARD_LOOPSPERMSEC=5500
 CONFIG_BUILTIN=y
 CONFIG_CDCACM=y
+CONFIG_CDCACM_RXBUFSIZE=256
+CONFIG_CDCACM_TXBUFSIZE=2048
 CONFIG_DEBUG_FULLOPT=y
 CONFIG_DEBUG_SYMBOLS=y
 CONFIG_FAT_LCNAMES=y
diff --git a/boards/arm/nrf53/thingy53/configs/rgbled_cpuapp/defconfig b/boards/arm/nrf53/thingy53/configs/rgbled_cpuapp/defconfig
@@ -21,6 +21,8 @@ CONFIG_BOARD_LOOPSPERMSEC=5500
 CONFIG_BUILTIN=y
 CONFIG_CDCACM=y
 CONFIG_CDCACM_CONSOLE=y
+CONFIG_CDCACM_RXBUFSIZE=256
+CONFIG_CDCACM_TXBUFSIZE=256
 CONFIG_DEBUG_ASSERTIONS=y
 CONFIG_DEBUG_FEATURES=y
 CONFIG_DEBUG_FULLOPT=y
diff --git a/boards/arm/sam34/sam4e-ek/configs/usbnsh/defconfig b/boards/arm/sam34/sam4e-ek/configs/usbnsh/defconfig
@@ -27,6 +27,8 @@ CONFIG_CDCACM=y
 CONFIG_CDCACM_CONSOLE=y
 CONFIG_CDCACM_EPBULKIN=3
 CONFIG_CDCACM_EPBULKOUT=2
+CONFIG_CDCACM_RXBUFSIZE=256
+CONFIG_CDCACM_TXBUFSIZE=256
 CONFIG_ETH0_PHY_KSZ8051=y
 CONFIG_FAT_LCNAMES=y
 CONFIG_FAT_LFN=y
diff --git a/boards/arm/sam34/sam4s-xplained-pro/configs/fs/defconfig b/boards/arm/sam34/sam4s-xplained-pro/configs/fs/defconfig
@@ -25,6 +25,8 @@ CONFIG_BOARD_LOOPSPERMSEC=11401
 CONFIG_BUILTIN=y
 CONFIG_CDCACM=y
 CONFIG_CDCACM_BULKIN_REQLEN=250
+CONFIG_CDCACM_RXBUFSIZE=1024
+CONFIG_CDCACM_TXBUFSIZE=1024
 CONFIG_DEBUG_FULLOPT=y
 CONFIG_DEBUG_SYMBOLS=y
 CONFIG_FS_FAT=y
diff --git a/boards/arm/sam34/sam4s-xplained-pro/configs/nsh/defconfig b/boards/arm/sam34/sam4s-xplained-pro/configs/nsh/defconfig
@@ -22,6 +22,8 @@ CONFIG_BOARD_LOOPSPERMSEC=11401
 CONFIG_BUILTIN=y
 CONFIG_CDCACM=y
 CONFIG_CDCACM_BULKIN_REQLEN=250
+CONFIG_CDCACM_RXBUFSIZE=1024
+CONFIG_CDCACM_TXBUFSIZE=1024
 CONFIG_DEBUG_FULLOPT=y
 CONFIG_DEBUG_SYMBOLS=y
 CONFIG_EXAMPLES_CPUHOG=y
diff --git a/boards/arm/stm32/clicker2-stm32/configs/mrf24j40-6lowpan/defconfig b/boards/arm/stm32/clicker2-stm32/configs/mrf24j40-6lowpan/defconfig
@@ -23,6 +23,8 @@ CONFIG_BOARD_LOOPSPERMSEC=16717
 CONFIG_BUILTIN=y
 CONFIG_CDCACM=y
 CONFIG_CDCACM_CONSOLE=y
+CONFIG_CDCACM_RXBUFSIZE=256
+CONFIG_CDCACM_TXBUFSIZE=256
 CONFIG_DRIVERS_IEEE802154=y
 CONFIG_DRIVERS_WIRELESS=y
 CONFIG_EXAMPLES_NETTEST=y
diff --git a/boards/arm/stm32/clicker2-stm32/configs/mrf24j40-starhub/defconfig b/boards/arm/stm32/clicker2-stm32/configs/mrf24j40-starhub/defconfig
@@ -23,6 +23,8 @@ CONFIG_BOARD_LOOPSPERMSEC=16717
 CONFIG_BUILTIN=y
 CONFIG_CDCACM=y
 CONFIG_CDCACM_CONSOLE=y
+CONFIG_CDCACM_RXBUFSIZE=256
+CONFIG_CDCACM_TXBUFSIZE=256
 CONFIG_DRIVERS_IEEE802154=y
 CONFIG_DRIVERS_WIRELESS=y
 CONFIG_FAT_LCNAMES=y
diff --git a/boards/arm/stm32/clicker2-stm32/configs/mrf24j40-starpoint/defconfig b/boards/arm/stm32/clicker2-stm32/configs/mrf24j40-starpoint/defconfig
@@ -23,6 +23,8 @@ CONFIG_BOARD_LOOPSPERMSEC=16717
 CONFIG_BUILTIN=y
 CONFIG_CDCACM=y
 CONFIG_CDCACM_CONSOLE=y
+CONFIG_CDCACM_RXBUFSIZE=256
+CONFIG_CDCACM_TXBUFSIZE=256
 CONFIG_DRIVERS_IEEE802154=y
 CONFIG_DRIVERS_WIRELESS=y
 CONFIG_EXAMPLES_NETTEST=y
diff --git a/boards/arm/stm32/clicker2-stm32/configs/usbnsh/defconfig b/boards/arm/stm32/clicker2-stm32/configs/usbnsh/defconfig
@@ -21,6 +21,8 @@ CONFIG_BOARD_LOOPSPERMSEC=16717
 CONFIG_BUILTIN=y
 CONFIG_CDCACM=y
 CONFIG_CDCACM_CONSOLE=y
+CONFIG_CDCACM_RXBUFSIZE=256
+CONFIG_CDCACM_TXBUFSIZE=256
 CONFIG_FAT_LCNAMES=y
 CONFIG_FAT_LFN=y
 CONFIG_FS_FAT=y
diff --git a/boards/arm/stm32/clicker2-stm32/configs/xbee-6lowpan/defconfig b/boards/arm/stm32/clicker2-stm32/configs/xbee-6lowpan/defconfig
@@ -23,6 +23,8 @@ CONFIG_BOARD_LOOPSPERMSEC=16717
 CONFIG_BUILTIN=y
 CONFIG_CDCACM=y
 CONFIG_CDCACM_CONSOLE=y
+CONFIG_CDCACM_RXBUFSIZE=256
+CONFIG_CDCACM_TXBUFSIZE=256
 CONFIG_CLICKER2_STM32_MB1_XBEE=y
 CONFIG_DRIVERS_IEEE802154=y
 CONFIG_DRIVERS_WIRELESS=y
diff --git a/boards/arm/stm32/hymini-stm32v/configs/usbnsh/defconfig b/boards/arm/stm32/hymini-stm32v/configs/usbnsh/defconfig
@@ -21,6 +21,8 @@ CONFIG_BOARDCTL_USBDEVCTRL=y
 CONFIG_BOARD_LOOPSPERMSEC=5483
 CONFIG_CDCACM=y
 CONFIG_CDCACM_CONSOLE=y
+CONFIG_CDCACM_RXBUFSIZE=256
+CONFIG_CDCACM_TXBUFSIZE=256
 CONFIG_INIT_ENTRYPOINT="nsh_main"
 CONFIG_NSH_READLINE=y
 CONFIG_PREALLOC_TIMERS=4
diff --git a/boards/arm/stm32/maple/configs/nx/defconfig b/boards/arm/stm32/maple/configs/nx/defconfig
@@ -34,6 +34,8 @@ CONFIG_BOARD_LOOPSPERMSEC=5483
 CONFIG_BUILTIN=y
 CONFIG_CDCACM=y
 CONFIG_CDCACM_CONSOLE=y
+CONFIG_CDCACM_RXBUFSIZE=256
+CONFIG_CDCACM_TXBUFSIZE=256
 CONFIG_DEFAULT_SMALL=y
 CONFIG_EXAMPLES_NX=y
 CONFIG_EXAMPLES_NXHELLO=y
diff --git a/boards/arm/stm32/maple/configs/usbnsh/defconfig b/boards/arm/stm32/maple/configs/usbnsh/defconfig
@@ -33,6 +33,8 @@ CONFIG_BOARD_LOOPSPERMSEC=5483
 CONFIG_BUILTIN=y
 CONFIG_CDCACM=y
 CONFIG_CDCACM_CONSOLE=y
+CONFIG_CDCACM_RXBUFSIZE=256
+CONFIG_CDCACM_TXBUFSIZE=256
 CONFIG_DEFAULT_SMALL=y
 CONFIG_I2C=y
 CONFIG_INIT_ENTRYPOINT="nsh_main"
diff --git a/boards/arm/stm32/mikroe-stm32f4/configs/fulldemo/defconfig b/boards/arm/stm32/mikroe-stm32f4/configs/fulldemo/defconfig
@@ -31,6 +31,8 @@ CONFIG_BOARD_LOOPSPERMSEC=16717
 CONFIG_BUILTIN=y
 CONFIG_CDCACM=y
 CONFIG_CDCACM_CONSOLE=y
+CONFIG_CDCACM_RXBUFSIZE=256
+CONFIG_CDCACM_TXBUFSIZE=256
 CONFIG_DEBUG_SYMBOLS=y
 CONFIG_DEV_LOOP=y
 CONFIG_DRIVERS_AUDIO=y
diff --git a/boards/arm/stm32/mikroe-stm32f4/configs/kostest/defconfig b/boards/arm/stm32/mikroe-stm32f4/configs/kostest/defconfig
@@ -23,6 +23,8 @@ CONFIG_BOARD_LOOPSPERMSEC=16717
 CONFIG_BUILD_PROTECTED=y
 CONFIG_CDCACM=y
 CONFIG_CDCACM_CONSOLE=y
+CONFIG_CDCACM_RXBUFSIZE=256
+CONFIG_CDCACM_TXBUFSIZE=256
 CONFIG_DEBUG_SYMBOLS=y
 CONFIG_DEV_LOOP=y
 CONFIG_FS_FAT=y
diff --git a/boards/arm/stm32/mikroe-stm32f4/configs/usbnsh/defconfig b/boards/arm/stm32/mikroe-stm32f4/configs/usbnsh/defconfig
@@ -23,6 +23,8 @@ CONFIG_BOARD_LOOPSPERMSEC=16717
 CONFIG_BUILTIN=y
 CONFIG_CDCACM=y
 CONFIG_CDCACM_CONSOLE=y
+CONFIG_CDCACM_RXBUFSIZE=256
+CONFIG_CDCACM_TXBUFSIZE=256
 CONFIG_DEV_LOOP=y
 CONFIG_FS_FAT=y
 CONFIG_FS_ROMFS=y
diff --git a/boards/arm/stm32/odrive36/configs/usbnsh/defconfig b/boards/arm/stm32/odrive36/configs/usbnsh/defconfig
@@ -20,6 +20,8 @@ CONFIG_BOARD_LOOPSPERMSEC=15272
 CONFIG_BUILTIN=y
 CONFIG_CDCACM=y
 CONFIG_CDCACM_CONSOLE=y
+CONFIG_CDCACM_RXBUFSIZE=256
+CONFIG_CDCACM_TXBUFSIZE=256
 CONFIG_DEBUG_FULLOPT=y
 CONFIG_DEBUG_SYMBOLS=y
 CONFIG_EXAMPLES_HELLO=y
diff --git a/boards/arm/stm32/olimex-stm32-e407/configs/ina219/defconfig b/boards/arm/stm32/olimex-stm32-e407/configs/ina219/defconfig
@@ -22,6 +22,8 @@ CONFIG_BOARD_LOOPSPERMSEC=16717
 CONFIG_BUILTIN=y
 CONFIG_CDCACM=y
 CONFIG_CDCACM_CONSOLE=y
+CONFIG_CDCACM_RXBUFSIZE=256
+CONFIG_CDCACM_TXBUFSIZE=256
 CONFIG_EXAMPLES_HELLO=y
 CONFIG_EXAMPLES_INA219=y
 CONFIG_FS_PROCFS=y
diff --git a/boards/arm/stm32/olimex-stm32-e407/configs/usbnsh/defconfig b/boards/arm/stm32/olimex-stm32-e407/configs/usbnsh/defconfig
@@ -20,6 +20,8 @@ CONFIG_BOARD_LOOPSPERMSEC=16717
 CONFIG_BUILTIN=y
 CONFIG_CDCACM=y
 CONFIG_CDCACM_CONSOLE=y
+CONFIG_CDCACM_RXBUFSIZE=256
+CONFIG_CDCACM_TXBUFSIZE=256
 CONFIG_EXAMPLES_HELLO=y
 CONFIG_EXAMPLES_HELLOXX=y
 CONFIG_FS_PROCFS=y
diff --git a/boards/arm/stm32/olimex-stm32-h405/configs/usbnsh/defconfig b/boards/arm/stm32/olimex-stm32-h405/configs/usbnsh/defconfig
@@ -27,6 +27,8 @@ CONFIG_BOARD_LOOPSPERMSEC=16717
 CONFIG_BUILTIN=y
 CONFIG_CDCACM=y
 CONFIG_CDCACM_CONSOLE=y
+CONFIG_CDCACM_RXBUFSIZE=256
+CONFIG_CDCACM_TXBUFSIZE=256
 CONFIG_DEBUG_SYMBOLS=y
 CONFIG_EXAMPLES_ADC=y
 CONFIG_EXAMPLES_CAN=y
diff --git a/boards/arm/stm32/olimexino-stm32/configs/composite/defconfig b/boards/arm/stm32/olimexino-stm32/configs/composite/defconfig
@@ -48,6 +48,8 @@ CONFIG_CDCACM=y
 CONFIG_CDCACM_COMPOSITE=y
 CONFIG_CDCACM_NRDREQS=2
 CONFIG_CDCACM_NWRREQS=2
+CONFIG_CDCACM_RXBUFSIZE=96
+CONFIG_CDCACM_TXBUFSIZE=96
 CONFIG_COMPOSITE_IAD=y
 CONFIG_COMPOSITE_PRODUCTID=0x2022
 CONFIG_COMPOSITE_PRODUCTSTR="Composite Device"
diff --git a/boards/arm/stm32/stm3210e-eval/configs/composite/defconfig b/boards/arm/stm32/stm3210e-eval/configs/composite/defconfig
@@ -18,6 +18,8 @@ CONFIG_BOARDCTL=y
 CONFIG_BOARD_LOOPSPERMSEC=5483
 CONFIG_CDCACM=y
 CONFIG_CDCACM_COMPOSITE=y
+CONFIG_CDCACM_RXBUFSIZE=256
+CONFIG_CDCACM_TXBUFSIZE=256
 CONFIG_COMPOSITE_CONFIGSTR="system/composite"
 CONFIG_COMPOSITE_IAD=y
 CONFIG_COMPOSITE_PRODUCTID=0x2022
diff --git a/boards/arm/stm32/stm32_tiny/configs/usbnsh/defconfig b/boards/arm/stm32/stm32_tiny/configs/usbnsh/defconfig
@@ -31,6 +31,8 @@ CONFIG_BOARD_LOOPSPERMSEC=5483
 CONFIG_BUILTIN=y
 CONFIG_CDCACM=y
 CONFIG_CDCACM_CONSOLE=y
+CONFIG_CDCACM_RXBUFSIZE=256
+CONFIG_CDCACM_TXBUFSIZE=256
 CONFIG_DEFAULT_SMALL=y
 CONFIG_INIT_ENTRYPOINT="nsh_main"
 CONFIG_LINE_MAX=80
diff --git a/boards/arm/stm32/stm32f103-minimum/configs/sensors/defconfig b/boards/arm/stm32/stm32f103-minimum/configs/sensors/defconfig
@@ -27,6 +27,8 @@ CONFIG_BOARD_LOOPSPERMSEC=5483
 CONFIG_BUILTIN=y
 CONFIG_CDCACM=y
 CONFIG_CDCACM_CONSOLE=y
+CONFIG_CDCACM_RXBUFSIZE=256
+CONFIG_CDCACM_TXBUFSIZE=256
 CONFIG_DEFAULT_SMALL=y
 CONFIG_I2C=y
 CONFIG_I2C_DRIVER=y
diff --git a/boards/arm/stm32/stm32f103-minimum/configs/usbnsh/defconfig b/boards/arm/stm32/stm32f103-minimum/configs/usbnsh/defconfig
@@ -31,6 +31,8 @@ CONFIG_BOARD_LOOPSPERMSEC=5483
 CONFIG_BUILTIN=y
 CONFIG_CDCACM=y
 CONFIG_CDCACM_CONSOLE=y
+CONFIG_CDCACM_RXBUFSIZE=256
+CONFIG_CDCACM_TXBUFSIZE=256
 CONFIG_DEFAULT_SMALL=y
 CONFIG_INIT_ENTRYPOINT="nsh_main"
 CONFIG_LINE_MAX=80
diff --git a/boards/arm/stm32/stm32f3discovery/configs/nsh/defconfig b/boards/arm/stm32/stm32f3discovery/configs/nsh/defconfig
@@ -19,6 +19,8 @@ CONFIG_ARCH_STACKDUMP=y
 CONFIG_BOARD_LOOPSPERMSEC=6522
 CONFIG_BUILTIN=y
 CONFIG_CDCACM=y
+CONFIG_CDCACM_RXBUFSIZE=256
+CONFIG_CDCACM_TXBUFSIZE=256
 CONFIG_HAVE_CXX=y
 CONFIG_HAVE_CXXINITIALIZE=y
 CONFIG_HOST_WINDOWS=y
diff --git a/boards/arm/stm32/stm32f3discovery/configs/usbnsh/defconfig b/boards/arm/stm32/stm32f3discovery/configs/usbnsh/defconfig
@@ -22,6 +22,8 @@ CONFIG_BOARD_LOOPSPERMSEC=6522
 CONFIG_BUILTIN=y
 CONFIG_CDCACM=y
 CONFIG_CDCACM_CONSOLE=y
+CONFIG_CDCACM_RXBUFSIZE=256
+CONFIG_CDCACM_TXBUFSIZE=256
 CONFIG_HAVE_CXX=y
 CONFIG_HAVE_CXXINITIALIZE=y
 CONFIG_HOST_WINDOWS=y
diff --git a/boards/arm/stm32/stm32f429i-disco/configs/usbnsh/defconfig b/boards/arm/stm32/stm32f429i-disco/configs/usbnsh/defconfig
@@ -20,6 +20,8 @@ CONFIG_BOARD_LOOPSPERMSEC=16717
 CONFIG_BUILTIN=y
 CONFIG_CDCACM=y
 CONFIG_CDCACM_CONSOLE=y
+CONFIG_CDCACM_RXBUFSIZE=256
+CONFIG_CDCACM_TXBUFSIZE=256
 CONFIG_DEV_LOOP=y
 CONFIG_FS_FAT=y
 CONFIG_FS_PROCFS=y
diff --git a/boards/arm/stm32/stm32f4discovery/configs/nxscope_cdcacm/defconfig b/boards/arm/stm32/stm32f4discovery/configs/nxscope_cdcacm/defconfig
diff --git a/boards/arm/stm32/stm32f4discovery/configs/usbnsh/defconfig b/boards/arm/stm32/stm32f4discovery/configs/usbnsh/defconfig
diff --git a/boards/arm/stm32l4/steval-stlcs01v1/configs/usbnsh/defconfig b/boards/arm/stm32l4/steval-stlcs01v1/configs/usbnsh/defconfig
diff --git a/boards/mips/pic32mx/sure-pic32mx/configs/usbnsh/defconfig b/boards/mips/pic32mx/sure-pic32mx/configs/usbnsh/defconfig
diff --git a/boards/risc-v/mpfs/icicle/configs/hwtest/defconfig b/boards/risc-v/mpfs/icicle/configs/hwtest/defconfig
